decreasing dust

• 降尘

decreasing dust的用法和样例：

例句

1. The coolant helps to keep down dust and reduce the fire hazard.
   冷却剂有功于降尘并减少火情。
2. The fall of dust has obviously reduced since environmental protection departments determined to improve the environment.
   环境部门加大力度改善环境，市区降尘量明显下降。